KVPY SX SB Exam 20141 Question Paper

Question : 41 of 120

Marks: +1, -0

CHEMISTRY

When 1.88 g of AgBr(s) is added to a 10

^{-3}

M aqueous solution of KBr, the concentration o f Ag

^{+}

is 5 × 10

^{-10}

M. If the same amount of AgBr(s) is added to a 10

^{-2}

M aqueous solution of AgNO

_3

, the concentration o f Br

^{-}

Solution:

K_{sp(\AgBr) }= [Ag^{+}] [Br^{-}]

= (5 × 10^{-10}) (10^{-3})

= 5 × 10^{-13}

Now

5 × 10^{–13} = (10^{–2}) [Br^{-}]

[Br^{-}] = 5 × 10^{–11}

Go to Question:

Prev Question

Next Question